Circuit making and breaking mechanism



Sept. 5, 1933.v A. F. LAKE 1,925,561

CIRCUIT MAKING AND BREAKING MECHANISM Filed Oct. 5, 1927 NW. O

IN VEN TOR.

Patented Sept. 5, 1933 1 UNITED STATES PATENT OFFICE CIRCUIT MAKING AND BREAKING MECHANISM Allan F. Lake, Oakland, Calif. Application October 5, 1927. Serial No. 224,118 7 Claims. (Cl. 172-126) This invention relates to a direct current circontact member 19 and an armature member cuit making and breaking mechanism to be used 20. The solenoid magnet is provided with two in conjunction with electric bells, gongs, vibraterminal posts 21 and 22 which may be connected tors, and other electro-magnetic actuated dewith a direct current circuit in the usual manvices. ner. The terminal 22 is connected with the 1 of direct current making and breaking mechabeing connected through wire 25 with the lower nism whereby the circuit through the coil of a end of the conductor strip 15. A circuit will bell or like electro-magnetic actuated device may in t s ma r be c osed ou the Coil B be automatically controlled. when the contacts 16 and 19 engage, as shown The invention is shown by Way of illustration in Fig. 1, a d i s a l a a Y broken When in the accompanying drawing in which: they are separated, as shown in F 2- 70 Fig. 1 is a central vertical longitudinal sec- Practically all of the electro-magnetic devices tion of an electro-magnetic actuated hell or gong in u fi y Whether bells, Vibrators Whatshowing the application of the invention, v r h case m y mp y a l and a m v- Fig. 21's a similar section showin the ir it able armature. The armature in turn carries 'making and breaking mechanism in a position a striker and it also invariably carries the circuit 75 Where the circuit is broken. making and breaking mechanism. It is here Referring to the drawing in detail, A indi t that the present invention distinguishes over ora base member upon which is mou t d il dinary practice, as it will be noted that the circoil illustrated in the present instance is of the iy i p d y of h m tu S r 80 material, as is usually the case; this tube being Words, tWO armatlll'es are p oyed, a ma n a1- secured i place by a cap :4 t one end and a mature indicated at 7 and a second armature as noid tube is the movable core member or arthe Circuit through the Coilmature previously referred to and indicated at The Spring tension of h b ati g arm 18 is C. This movable core me b r consists of an such that the contacts will normally close, as enlar ed central guide portion 7, an upper shown in Fig. 1. When they so close a circuit duced end sect on 3, nd a lower reduced end is established in the coil and the magnetic flux section 9 which forms th t ik Th upper thus set up will simultaneously actuate both the reduced portion 8 carries a helical compression main aimature and the Secondary. ature.

This conductor strip is secured to the frame 10 and Secondly, due to the avitational movepiece 13 by a post and insulating washers inment of the main armature. The secondary ar- .dicated at 17. This post also supports a spring mature, together with the vibrating arm 18 is 55 arm 18 and this in turn carries a movable simultaneously returned to the position shown in Fig.1 and the electric circuit through the coil is again closed and the cycle of operation is thus repeated and repeated as long as the current is passing through the terminals 21 and 22. It 5 should be noted that until the armature 7 is drawn upwardly there is an air gap between it and the stationary armature 6. Hence the magnetic field is weaker than it is after the armature '7 has been drawn into contact with the armature l0 6. The tension of spring 18, upon which the armature 20 is supported, is such that until the strength of the field is increased by upward movement of the armature '7, the armature 20 is not moved to open the make and break device. The result is that a relatively slow action is given to the armature '7 and striker 9 carried thereby. Such action is desirable to bring out the full resonance of the bell D. Another important feature which should be particularly noted is the fact that the secondary armature does not move into engagement with the pole piece 12 and as such will not be subjected to the severe vibrations usually encountered. The bell mechanism or armature C has no mechanical connection 2?,, with the contacts or circuit breaking mechanism, thus further safeguarding or protecting the contacts and spring from excess vibration and hammer action. The circuit breaker, furthermore, forms a complete, independent 0 .unit and receives only sufficient magnetic flux to insure its positive operation. The contacts may thus be made large, and sparking is reduced to a minimum due to the small amount of iron subjected to magnetic influence. While the circuit making and breaking mech- 'anism is here shown as used in conjunction with an electric bell or gong, it may obviously be used on any electro-magnetic vibrating or reciprocating device which is actuated by a direct cur- 40 .rent. 1

While certain features of the present invention are more or less specifically described, I wish it understood that various changes may be resorted to within the scope of the appended claims. Sim- 5 ilarly, that the materials and finishes of the sev- "eral parts employed may be such as the manufacturer may decide or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:-

1. An electro-magnetic device of the character described comprising a coil, an armature member reciprocally mounted within the coil, and a second armature mounted for oscillation adjacent the coil and adapted to operate a make and break device for alternately energizing and de-energizing the coil whereby the first named armature will be reciprocated therein, the motion of said first and second named armatures being synchronized and so correlated that the position of the first named armature within the coil will control the degree of magnetism aiiecting the second named armature. A 2. An electro-magnetic device comprising a coil, 5,;an armature member reciprocally mounted within the coil and adapted to be actuated thereby, a

make and break device for alternately energizing and de-energizing said coil, said make and break device being actuated by a second armature mounted for oscillating movement exterior of the coil, and a pole piece disposed adjacent the free end of the second armature at a point where the second armature can move into alignment with the pole piece without engaging the same, said pole piece also being energized by said coil.

3. An electro-magnetic device of the character described comprising a coil, a reciprocable armature adapted to be magnetically attracted upon energization of the coil, an oscillatory armature adapted to be attracted by energization of the coil, amake and break device actuated by the oscillatory armature, and an electric circuit for energizing the coil and including said make and break device, said reciprocable armature being adapted to reciprocate within the coil toward and away from the magnetic field thereof whereby its position will affect the degree of magnetism exerted upon said oscillatory armature.

4. An electro-magnetic device of the character described, comprising a coil, an armature member within the coil and mounted for reciprocal movement into and out of the coil, and a second armature mounted adjacent the coil and adapted to open and close a switch in a circuit for energizing the coil, said second armature normally holding said switch closed and being moved by the magnetic field of the coil to open the switch upon the event of the first armature being moved into the coil.

5. An electro-magnetic device of the character described, comprising a coil, an armature movable into and out of the coil, a second armature controlling the operation of a make and break device in a circuit for energizing the coil, said second armature normally closing said circuit and being caused to open the circuit only when the magnetic field of the coil is intensified by the first armature being drawn into the coil.

6. An electro-magnetic device of the character described comprising a coil, an armature movable into and out of the coil, a second armature controlling the operation of a make and break device in a circuit for energizing the coil, a spring supporting said second armature and normally re taining it in a position closing said circuit, the tension of said spring being such that the annature will be moved to open said circuit only when the magnetic field of the coil is intensified by the first armature being drawn into the coil.

'7. An electro-magnetic device of the character described comprising a coil, an armature movable into and out of the coil, a second armature controlling the operation of a make and break device in a circuit for energizing the coil, resilient means normally urging the second armature to a circuit closing position, the tension of said resilient means being such that the armature will be moved to open said circuit only when the magnetic field 01' the coil is intensified by the first armature being drawn into the coil.

ALLAN F. LAKE. 

